These BLACKHAWK! magazine pouches have a built-in tension spring, to hold your magazine in place until you need it. The adjustable tension also allows the use of a variety of magazines in each pouch. The unique belt clip can be removed and the pouch can be placed side by side on the dual rail accessory platform beside a flashlight carrier, for a dual-role platform. Features and Specifications: Manufacturer Number: 410500PBK For one single-stack 9mm to .45 caliber magazine Built-in tension spring Removable belt clip Matte black